/*
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
*/
/*
#include <stdio.h>
#define pi 3.141592653589
int main()
{
int p = pi;
double pp = pi;
printf("%d\n",p);
printf("%.3lf\n",pp);
printf("%.6lf\n",pp);
printf("%.12lf\n",pp);
}
*/
/*
#include <stdio.h>
int main()
{
double a = 10, b = 20, sum,sub;
sum = a+b;
sub = a/b;
printf("%lf/%lf=%lf",a,b,sub);
}
*/
/*
#include <stdio.h>
int main()
{
char a;
a = 'A';
printf("a = %c\n",a);
printf("a = %d",a);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
char a[20];
printf("앵두: ");
scanf("%s",a);
printf("앵두: ");
printf("%s jam",a);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int sub;
double ha;
printf("섭씨온도 입력 =");
scanf("%d",&sub);
ha=(sub*1.8)+32;
printf("%.1lf",ha);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a, b, c, d, e,f,g;
a = 10;
b = 12;
c = (a&b);
d = (a|b);
printf("%d\n%d",c,d);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a;
printf("입력=");
scanf("%d",&a);
if(a > 100)
{
printf("조정=100");
}
}
*/
/*
#include <stdio.h>
int main()
{
int num = 0;
scanf("%d",&num);
switch(num<30)
{
case 1:
printf("good");
case 0:
switch
}
}
*/
#include <stdio.h>
int main()
{
int a, sum = 0, jegop=1;
printf("2진수입력:");
scanf("%d",&a);
while(a != 0)
{
sum += (a % 10) * jegop ;
jegop *= 2;
a = a/10;
}
printf("10진수=%d",sum);
}